Improvement in gauge-cocks



P. MCGRATH.

Gauge Cock.

Patented August 8, 1871.

fnl/Venier.

tube

PATRICK MCGRATH, OF PLATTSBURG, NEWY YORK.

IMPROVEMENT IN GAUGE-COCKS.

Specilcation forming part of Letters Patent No. 117,907, dated August 8,1871.

To all whom it lmay concern.:

Be it known that I, PATRICK MGG'RATH, of Pla-ttsburg, in the county ofClinton and State of New York, have invented a nenT and usefulIniproveinent in Gaugeocks; a-nd I do hereby de- Clare that thefollowingis afull and exact description oi' the saine, reterencebeinghad to theaccompanying drawing and to the letters of reference marked thereon.

This invention has for its object the production of a gauge-cock which,from its peculiar construction, shall obviate many diiculties incidentalto the ordinary forms, and possess marked advantages over them; andconsists in certain details of construct-ion, which will be fullydescribed hereinafter.

In the drawing, Figure 1 represents a perspective view of inyiinprovedgauge-cock; Fig. 2, a central sectional elevation; and Figs. 3 and 4,views of the valve.

To enable others skilled in the art to make and use my invention, l Willnow proceed to describe fully its construction and operation.

' A. represents a metallic cylinder, which is provided With alongitudinal central bore, a., for the reception of the valve-rod I),and also with the smaller steam-passage al, located upon one side oi thelongitudinal center line, as shown. rlhis passage a1 is connected atabout the center of its length with a discharge-tube, a2, as shown. The

end of the cylinder A is suitably threaded, in order that it may beremovably attached to the secured to the boiler, and the other endsuitab y torined to receive a Wrench, by which means it is readilyattached or detached. B represents the valve, constructed preferably or'a suitable block of metal, quadrangular in form, and having' inclinedsides bl b1, as shown. This valve is revolved upon the valve-seat a ofthe cylinder A for the purpose of covering` or uncovering the openingotA the stea-ni-liassage a by means of the valve-rod b, which extendsthrough the central bore a. of the cylinder, and is provided With acrank, b2, rigidly attached thereto, as shown. G represents. a lever,provided with an opening, c, by means of which it is slipped over thevalve-rod B, which lever is further provided, also, upon its short arin,With a short stud, c', which latter, When in place, projects into andcloses the outer end of the steani-liiassage al. D represents a collarlocated upon the valve-rod between the lever C and the crank b1, Whichis provided with a socket for the reception of a short spiral spring, d,which rests thereon, and bears against the crank-arm, as shown.

The operation is as follows: The crank-arm is operated in the usualmanner to use the cock. By its movement the valve is revolved to coveror uncover, as inay be desired, the inner opening ot' the steanilpassageal, by which ineans steam or Water, as the case may be, is permitted topass out through the steam-discharge tube a2, or is cut oit therefrom.The outer end of the passage a, it will be observed, is closed by thestud of the lever G. From the peculiar construction herein described itis impossible for obstructions to get between the valve and its seat,and, consequently, the valveis always tight, bein g kept in place notonly by thc pressure of the steam, but also by the action of the spiralspring d. By means of this latter, also, the necessary expansion andcontraction ot' the metals under the intl uence of the heat arepermitted. li' an obstruction shouldreinainprojectingfromthesteampassage as the valve closes, the projecting portion of it will besevered by the sharp edge formed by the inclined sideoi' the valve, and,bein g forced away as the valve revolves, no damage can result from it.

It the steainpassage should become clogged from any cause theobstruction may be .removed by uncovering the outer end of thesteam-passage al by withdrawing the stud of the lever C from the outerspring of the passage, this operation being easily permitted by theyielding of the spring d, and by inserting a suitable rod or Wire toremove the Obstruction.

The described gauge-cock is very siniple in its construction, andexceedingly etiective in its operation. li desired, substai'ltiallythesaine construction niay be used for faucets.

Havin g thus fully described iny invention, what I claim as new, anddesire to secure by Letters Patent, is-

1. The combination of a springlever with an independent steam-passage,as described.

2. The combination of the cylinder A, lever C, and spring d, as setforth.

, 3. The gauge-cock described, consisting of the cylinder A, valve B,with rod b and arm b2, lever C, and spring d, constructed and arrangedas described.

This specification signed and witnessed this 24th day of June, 1871.PATRICK MOGRATH.

Witnesses:

CORNELIUs HALsnY, ALFRED ROGERS.

